It might not be as bad as it looks, wifi scanner programs don't show various factors, most important is perhaps how heavily used each network is.
Channels 1 and 6 may have problems with the overlapping networks on channels 3 and 4, channel 11 may be slowed down a little due to the extra protection mechanisms due to the 11g network (which appears to be fairly close), and the network on channel 9 probably isn't helping channels 6 and 11 either.
In theory it's worse to partly overlap than be on the same channel as another network, and attempting to use 40 MHz of bandwidth would probably be even worse.
Channel 1 only really has 2 BT Home Hub 5s, although one appears to have some wireless extenders, plus there's what are presumably one company's networks.